CN1392091A - Real time monitor for conveyer belt failure - Google Patents

Real time monitor for conveyer belt failure Download PDF

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Publication number
CN1392091A
CN1392091A CN 02138851 CN02138851A CN1392091A CN 1392091 A CN1392091 A CN 1392091A CN 02138851 CN02138851 CN 02138851 CN 02138851 A CN02138851 A CN 02138851A CN 1392091 A CN1392091 A CN 1392091A
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circuit
magnetic field
load
transfer device
signal
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CN 02138851
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CN1192958C (en
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邓小明
阮江军
付中华
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Wuhan University WHU
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Wuhan University WHU
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Abstract

The real-time monitor includes conveying belt with one or several embedded closed metal wire looips, one magnetic field generator to couple one alternate magnetic flux to the metal wire loops and one magnetic field detecting instrument to detect the alternate magnetic field prdouced by the induction current of closed metal wire loops. The present invention can realize multiple alarm of longitudinal breakage, transverse breakage, speed decrease caused by coal blocking or sliding, etc.; protect the conveying belt via alarm before breakage; prolong its service life and reduce relevant loss. In addition, present invention has the advantages of simple structure and low cost.

Description

Load-transfer device fault real-time monitoring device
Technical field
The present invention relates to a kind of load-transfer device fault real-time monitoring device.
Background technology
In bulk cargo load-transfer device conveying technology field, need to solve tearing of occurring in the load-transfer device operational process, rupture, skid, failure monitoring and warning problem such as stall.
Aspect existing conveyer band discerption safeguard procedures; make the deflector chute that bulk materials can be unimpeded except load onto electric magnetic iron remover, design in initial charging place; what use more is the longitudinal tear checking system; promptly tearing the big place of possibility; the protection sensor is torn in installation, and is connected with master control unit, in time reports to the police when load-transfer device is torn; conveyer is stopped transport, to reduce the length of tearing of load-transfer device.
Tear aspect the product in that load-transfer device is anti-at present, mainly contain following several:
1) clavate anti-tear device: mainly be to utilize to bend to rod or the pipe similar, it be installed between every group of impact idler, and be close to below the load-transfer device to grooved load-transfer device profile.If object pierces through load-transfer device, make and this rod or pipe deflection trigger the limit switch or the pressure sensor that are connected on the bar that the instruction conveyer is shut down.
2) string of a musical instrument formula device: mainly utilize finer wire or nylon wire, it is installed between the impact idler, fit with flute profile load-transfer device lower surface, an end of line is adorned a spring limit switch.If object pierces through load-transfer device, make this thread breakage or pulling force increase, starting switch, the instruction conveyer is shut down.
3) stripe board pressure switch: mainly utilize the several piece stripe board; it is installed together the gabarit form that constitutes the flute profile load-transfer device; be installed between the lower surface impact idler of load-transfer device; any object that pierces through load-transfer device all can make the stripe board action that faces this object; trigger switch, the instruction conveyer is shut down.
4) material from leakage detects: when load-transfer device was torn, the material of conveying leaked out by breach.Monitor utilizes the material that leaks out behind the conveyer band discerption, and trigger protection switch order conveyer stops.
5) ultrasonic testing: utilize the super sonic transfer principle, the position installing that longitudinal tear takes place easily at load-transfer device transmits the hypracoustic waveguide.In case load-transfer device generation longitudinal tear, waveguide damages because of crooked, send ripple and is subjected to ripple to become different conditions, promptly sends the signal of longitudinal tear, and the instruction conveyer stops.
6) pressure sensing shape: utilize two pressure sensors, be installed on the bucket wall dodge gate respectively and load-transfer device rack below, run into when bulk foreign matter or rectangular crooked chisel pierce through load-transfer device and report to the police, the instruction conveyer is shut down.
The major defect that above-mentioned longitudinal tear alarm technique exists is: only could work behind conveyer band discerption, for situation owing to accumulation obstruction or other load-transfer device that weares and teares gradually, can't carry out early warning by actv., therefore only just reaction to some extent after load-transfer device is worn out can not effectively reduce causality loss.
Aspect load-transfer device cross break monitoring device, mainly contain following technology:
1) based on image process method: adopt the X ray projection imaging method to carry out lossless detection, X-ray beam penetrates operating load-transfer device, dimension X-ray photovoltaic detector by the load-transfer device opposite side receives, form the image pixel electric signal, after amplifying, gather, changing, be transferred to microcomputer system, load-transfer device fortune turns around, and just can observe the dynamic image of whole steel ropes in the band in real time, continuously, monitors whole situations of steel rope.(" coal science and technology " the 28th the 3rd phase of volume, in March, 2000, P31-32; " colliery automation " the 3rd phase in 1997, P40-42)
2) method of pre-buried magnetic patch: at the pre-buried magnetic patch in conveying band joint two ends,, handle in real time, realize the online detection of conveying band joint elongation, whether rupture to judge conveying band joint with micro controller system by the Hall element acquired signal.(" coal science and technology " the 28th the 12nd phase of volume, in December, 2000, P14-15)
3) the damaged detection method of steel core: the ray that utilizes the x-ray source to produce, pass running strong belt after, shine on the one dimension photodiode array of x-ray dash receiver, steel core mapping image in the strong belt is converted to current signal; Pass through processing means such as amplification, filtering, collection again, calculate the elongation of belt intensity and joint.(" colliery automation " the 4th phase in 1998, P49-51)
The major defect that above-mentioned cross break alarm technique exists is: technical sophistication, cost is higher.
Summary of the invention
The present invention provides a kind of load-transfer device fault real-time monitoring device at the problems referred to above exactly, and this device can not only be reported to the police before conveyer band discerption or fracture, and simple in structure, cost is lower.
Technical scheme provided by the invention is: a kind of load-transfer device fault real-time monitoring device, comprise load-transfer device, imbed the C/LOOP that one or several plain conductors constitute in the load-transfer device top layer, be provided with the magnetic field generator that makes an alternating flux of interlinkage in the plain conductor C/LOOP, be provided with detection is produced alternating magnetic field by the inducing current in the plain conductor C/LOOP magnetic field measurement instrument.
Above-mentioned magnetic field generator is made up of square-wave generator, frequency dividing circuit, shaping circuit, power amplification circuit, the mouth of square-wave generator is connected with the input end of frequency dividing circuit, the mouth of frequency dividing circuit is connected with the input end of shaping circuit, the mouth of shaping circuit is connected with the input end of power amplification circuit, and the mouth of power amplification circuit is connected with the input end of spiral tube.
Above-mentioned magnetic field measurement instrument comprises acquisition of signal part, signal processing and signal aspect and indication part, acquisition of signal partly adopts measuring sonde, signal processing is made up of series resonant circuit, amplifying circuit, sampling and A/D change-over circuit, micro controller system, signal aspect and indication partly is the LED display circuit, the field signal that measuring sonde collects is after series resonant circuit filtering, amplifying circuit amplify, send into micro controller system again after over-sampling and A/D conversion and handle, store, the LED display circuit shows real result of a measurement and data query.
Above-mentioned measuring sonde is the induction coil of space three-dimensional quadrature.
The present invention also is provided with the interrupt control circuit of the above-mentioned micro controller system of control.
The present invention is owing to adopt said structure, and load-transfer device is in operational process, and magnetic field generator produces the alternating magnetic field driving source of a certain frequency, makes the magnetic flux of an alternation of interlinkage in the plain conductor C/LOOP, thereby induces electro-motive force, and produce inducing current; On the other hand, utilize magnetic field measurement instrument, survey the alternating magnetic field that produces by the inducing current in the plain conductor C/LOOP.In the load-transfer device operational process, do not hurt on the load-transfer device top layer, under the situation that the plain conductor C/LOOP is not cut off, magnetic field measurement instrument sends the working signal of " normally "; , hurt when the load-transfer device top layer, when the plain conductor C/LOOP was cut off, magnetic field measurement instrument sent alerting signal; When load-transfer device owing to skid, when stall causes that belt speed descends, magnetic field measurement instrument can detect the variation of field signal, and sends alerting signal.Thereby the present invention can realize longitudinal tear, cross break, chute blockage or the load-transfer device rotating speed that causes that skids under the multiple alarm and protection of degradation; Can accomplish before conveyer band discerption or fracture, to report to the police, effectively protect load-transfer device, prolong the service life of load-transfer device, reduce because the loss of tearing or rupturing and causing.The present invention also has advantage simple in structure, that cost is lower.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the circuit structure block diagram of magnetic field generator of the present invention;
Fig. 3 is the circuit structure block diagram of magnetic field measurement instrument of the present invention.
The specific embodiment
Referring to Fig. 1, the present invention includes load-transfer device 1, imbed the C/LOOP 2 that one or several plain conductors constitute in load-transfer device 1 top layer, be provided with the magnetic field generator 3 that makes an alternating flux of interlinkage in the plain conductor C/LOOP 2, be provided with detection is produced alternating magnetic field by the inducing current in the plain conductor C/LOOP 2 magnetic field measurement instrument 4.
Magnetic field generator 3 is made up of square-wave generator 7, frequency dividing circuit 8, shaping circuit 9, power amplification circuit 10, and square-wave generator 7 is selected multi-vibrator or quartz oscillator (recommending to use quartz oscillator) for use, produces the impulse singla of frequency fixing.Frequency dividing circuit 8 is made of counting machine and frequency selective switch, will be transformed into the square-wave signal of characteristic frequency from the incoming signal of square-wave generator 7.Shaping circuit 9 utilizes the square-wave signal of resonator, filter technology self frequency-dividing circuit 8 in future to be transformed into sinusoidal signal.Power amplification circuit 10 utilizes multistage pliotron to be amplified to rating horsepower from the sinusoidal signal of shaping circuit 9.The outgoing current of power amplification circuit 10 is supplied with screw actuator 5 through divider resistance.Screw actuator 5 can turn to specific path, space as required, and putting on shank can be selected in screw actuator 5 inside, to improve magnetic flux density.Transformation rectifying circuit 11 is on the one hand with the filtering of 220V AC rectification, supplies with the loop that the afterbody by screw actuator 5 and power amplification circuit 10 constitutes; Pass through voltage transformer and rectifying and wave-filtering on the other hand, obtain two kinds of vdc V1 and V2, supply with frequency dividing circuit 8, shaping circuit 9 and power amplification circuit 10 respectively.
Magnetic field measurement instrument 4 comprises acquisition of signal part, signal processing and signal aspect and indication part, acquisition of signal partly adopts measuring sonde 6, signal processing is made up of series resonant circuit 12, amplifying circuit 13, sampling and A/D change-over circuit 14, micro controller system 15, signal aspect and indication partly is a LED display circuit 16, the field signal that measuring sonde 6 collects is after series resonant circuit 12 filtering, amplifying circuit 13 amplify, send into micro controller system 15 again after over-sampling and A/D conversion and handle, store, LED display circuit 16 shows real result of a measurement and data query.
Adopting electromagnetic induction principle, is measuring sonde 6 with the induction coil of space three-dimensional quadrature, and the magnetic field that like this can measurement space distributes arbitrarily will be treated that measuring magnetic field is transformed to the light current that is directly proportional with it and presses signal, and be write down each component.The frequency content that probe 6 field signals that collect comprise is very abundant, for the field signal of the characteristic frequency that will measure, adopt series resonant circuit 12 to realize narrow-band filtering, for the lower field signal of frequency, adopt gyrator to produce big inductance, to satisfy condition of resonance.Signal to the single-frequency behind the resonance is amplified by amplifying circuit 13, and magnification factor is according to the big or small automatically regulating of original signal, to realize the automatic switchover of range.Amplified analog signal by sampling and A/D change-over circuit 14 is sampled, A/D conversion, is sent into micro controller system 15 then and handled.In micro controller system 15, adopted filtering algorithm efficiently, eliminate noise and recovering signal, event memory on request.LCD display circuit 16 shows result of a measurement or data query, and exports result of a measurement by I/O interface circuit 18 to upper computer.Interrupt control circuit 17 is the running state of control single chip computer 15 flexibly, comprises real-time measurement, data query etc.Power unit 19 adopts chargeable battery, produces the direct voltage source that meets the electronic circuit job requirement.
One aspect of the present invention is made the magnetic flux of an alternation of interlinkage in the plain conductor C/LOOP, thereby is induced electro-motive force by the alternating magnetic field driving source of a certain frequency of magnetic field generator 3 generations, and produces inducing current; On the other hand, utilize magnetic field measurement instrument 4, survey the alternating magnetic field that produces by the inducing current in the plain conductor C/LOOP.
Magnetic field generator 3 of the present invention and magnetic field measurement instrument 4 can be connected with the load-transfer device upper computer control system, when load-transfer device 1 start operation, magnetic field generator 3 and magnetic field measurement instrument 4 energized are started working, and carry the working signal (digital signal) of " normally " or " improper " to the load-transfer device upper computer control system.When load-transfer device 1 is shut down, cut off the power supply of magnetic field generator 3 and magnetic field measurement instrument 4, system quits work.
In load-transfer device 1 operational process, do not hurt on load-transfer device 1 top layer, under the situation that plain conductor C/LOOP 2 is not cut off, magnetic field measurement instrument 4 is carried the working signal of " normally " to the load-transfer device upper computer control system.
In load-transfer device 1 operational process, when load-transfer device 1 top layer is hurt, when plain conductor C/LOOP 2 was cut off, magnetic field measurement instrument 4 was carried the alerting signal of " improper " to the load-transfer device upper computer control system, handled for upper computer, as out-of-service inspection etc.
In load-transfer device 1 operational process, when load-transfer device 1 owing to skid, when stall causes that belt speed descends, magnetic field measurement instrument 4 can detect the variation of field signal, and to the upper computer output alarm signal.
Adopt said structure the present invention can realize longitudinal tear, cross break, chute blockage or the load-transfer device rotating speed that causes that skids under the multiple alarm and protection of degradation.Can accomplish before conveyer band discerption or fracture, to report to the police, effectively protect load-transfer device, prolong the service life of load-transfer device, reduce because the loss of tearing or rupturing and causing.Also can realization and upper computer or seamless being connected of load-transfer device monitored control system, the existing investment of protection.

Claims (5)

1. load-transfer device fault real-time monitoring device, comprise load-transfer device, it is characterized in that: imbed the C/LOOP that one or several plain conductors constitute in the load-transfer device top layer, be provided with the magnetic field generator that makes an alternating flux of interlinkage in the plain conductor C/LOOP, be provided with detection is produced alternating magnetic field by the inducing current in the plain conductor C/LOOP magnetic field measurement instrument.
2. monitoring device according to claim 1, it is characterized in that: magnetic field generator is made up of square-wave generator, frequency dividing circuit, shaping circuit, power amplification circuit, the mouth of square-wave generator is connected with the input end of frequency dividing circuit, the mouth of frequency dividing circuit is connected with the input end of shaping circuit, the mouth of shaping circuit is connected with the input end of power amplification circuit, and the mouth of power amplification circuit is connected with the input end of spiral tube.
3. monitoring device according to claim 1 and 2, it is characterized in that: magnetic field measurement instrument comprises acquisition of signal part, signal processing and signal aspect and indication part, acquisition of signal partly adopts measuring sonde, signal processing is made up of series resonant circuit, amplifying circuit, sampling and A/D change-over circuit, micro controller system, and signal aspect and indication partly is the LED display circuit.
4. magnetic field measurement instrument according to claim 3 is characterized in that: the interrupt control circuit that is provided with control single chip computer.
5. monitoring device according to claim 3 is characterized in that: measuring sonde is the induction coil of space three-dimensional quadrature.
CNB021388512A 2002-07-30 2002-07-30 Real time monitor for conveyer belt failure Expired - Fee Related CN1192958C (en)

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Application Number Priority Date Filing Date Title
CNB021388512A CN1192958C (en) 2002-07-30 2002-07-30 Real time monitor for conveyer belt failure

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Application Number Priority Date Filing Date Title
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CN1192958C CN1192958C (en) 2005-03-16

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1832894B (en) * 2003-09-03 2010-07-21 凤凰股份有限公司 Device for monitoring a conveyor
CN102491069A (en) * 2011-11-15 2012-06-13 江南大学 Intelligent wireless detecting system for longitudinal tearing of conveying belts
CN101657367B (en) * 2007-01-26 2012-08-22 先进影像技术（控股）有限公司 Monitoring of conveyor belts
CN102673977A (en) * 2012-04-17 2012-09-19 安徽理工大学 Device and method for real-time detection of tearing of coal conveying belt
CN101365637B (en) * 2006-02-10 2013-01-23 Rwe动力股份公司 Method for monitoring and/or testing without destruction a transmission element, and arrangement for carrying out the method
CN103896035A (en) * 2014-03-20 2014-07-02 济钢集团有限公司 Rubberized roller abrasion early warning device used for belt conveying system
CN107399583A (en) * 2017-07-31 2017-11-28 西安科技大学 Ribbon conveyer transporting coal belt slack is broken early warning protection system and method
CN110498188A (en) * 2019-07-08 2019-11-26 中国矿业大学 Fully-mechanized mining working surface conveyor chain condition checkout gear and method
CN110902264A (en) * 2019-12-11 2020-03-24 北京中煤煤炭洗选技术有限公司 Anti-tear rubber conveyer belt and conveyer belt monitored control system
CN114229384A (en) * 2021-12-31 2022-03-25 深圳市翌日科技有限公司 Scraper conveyor life cycle prediction and judgment method, analysis equipment and system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1832894B (en) * 2003-09-03 2010-07-21 凤凰股份有限公司 Device for monitoring a conveyor
CN101365637B (en) * 2006-02-10 2013-01-23 Rwe动力股份公司 Method for monitoring and/or testing without destruction a transmission element, and arrangement for carrying out the method
CN101657367B (en) * 2007-01-26 2012-08-22 先进影像技术（控股）有限公司 Monitoring of conveyor belts
CN102491069A (en) * 2011-11-15 2012-06-13 江南大学 Intelligent wireless detecting system for longitudinal tearing of conveying belts
CN102491069B (en) * 2011-11-15 2013-06-12 江南大学 Intelligent wireless detecting system for longitudinal tearing of conveying belts
CN102673977B (en) * 2012-04-17 2014-09-10 淮矿现代物流有限责任公司 Device and method for real-time detection of tearing of coal conveying belt
CN102673977A (en) * 2012-04-17 2012-09-19 安徽理工大学 Device and method for real-time detection of tearing of coal conveying belt
CN103896035A (en) * 2014-03-20 2014-07-02 济钢集团有限公司 Rubberized roller abrasion early warning device used for belt conveying system
CN107399583A (en) * 2017-07-31 2017-11-28 西安科技大学 Ribbon conveyer transporting coal belt slack is broken early warning protection system and method
CN107399583B (en) * 2017-07-31 2018-06-15 西安科技大学 Ribbon conveyer transporting coal belt slack is broken early warning protection system and method
CN110498188A (en) * 2019-07-08 2019-11-26 中国矿业大学 Fully-mechanized mining working surface conveyor chain condition checkout gear and method
WO2021003902A1 (en) * 2019-07-08 2021-01-14 中国矿业大学 Fully mechanized mining face scraper conveyer chain state detection device and method
CN110902264A (en) * 2019-12-11 2020-03-24 北京中煤煤炭洗选技术有限公司 Anti-tear rubber conveyer belt and conveyer belt monitored control system
CN114229384A (en) * 2021-12-31 2022-03-25 深圳市翌日科技有限公司 Scraper conveyor life cycle prediction and judgment method, analysis equipment and system

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